Unused fund in Zerodha

Is there any provision in Zerodha to keep unused fund in some forms with some ROI but should be allowed to taken out anytime when needed…

You can always park excess funds in Liquidbees. Your capital is protected and you will earn some interest over it (paid in the form of dividends). You can sell it anytime you wish and instantly use the proceeds to trade.

What are liquid bees…What is ROI in investing in it…

Would like to know more about it

The given link fails to elaborate on the topic.